hypabyssal

[hip-uh-bis-uhl, hahy-puh-]

hyp·a·byss·al

[hip-uh-bis-uhl, hahy-puh-]
adjective Geology.
1.
(of an igneous rock) intermediate in texture between coarse-grained intrusive rocks and fine-grained extrusive rocks.
2.
noting any of various minor intrusions, as dikes and sills, that have crystallized under conditions intermediate between plutonic and extrusive.

Origin:
1890–95; hyp- + abyssal
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hypabyssal is always a great word to know.
So is leaching. Does it mean:
to dissolve out soluble constituents from ashes and soil by percolation
thin, distinctive stratum useful for stratigraphic correlation
Collins
World English Dictionary
hypabyssal (ˌhɪpəˈbɪsəl)
 
adj
(of igneous rocks) derived from magma that has solidified at shallow depth in the form of dykes, sills, etc
 
[C19: from hyp- + -abyssal]

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